User's Manual Part 1

13,56 MHz Multitag Reader Module, Version 0.9v
ACG Identification Technologies AT Page 12
3.7 ISO 14443
The reader can only handle single tags according ISO 14443 type A or B. The reader
only identifies single tags and returns its serial number.
All other command such as read, write, select are not supported.
The Mifare
®
transponder family consists of various 13.56 MHZ transponders
according to ISO14443. For more details refer to ISO14443 part 1-4.
3.8 Mifare® Ultralight
Mifare® Ultralight tags have no crypto algorithm included. They are designed for a
small data volume.
3.8.1 Memory organization
Byte
Page
address
3 2 1 0
0Fh User data
…
04h User data
03h OTP
02h Lock bytes reserved
01h Serial number
00h Serial number
Figure 3-14: Memory organization of Mifare® Ultralight
3.8.2 Serial number
The UID consists of 7 bytes. The first part of the UID is stored on page 00h the
second on page 01h. The storage format on page 00h fulfills ISO14443 Type A. The
UID is factory programmed and cannot be changed.